عنوان المقالة:تاثير الطاقة النوعية لليزر على تحسين الخواص لطلاءات الرش بالبلازما للزركونيا المستقرة جزئيا باليتيريا The influence of laser specific energy on laser sealing of plasma sprayed yttria partially stabilized zirconia coating
أ.د. علي سبع حمود | Professor Dr. Eng. Ali Sabea Hammood | 8776
Publication Type
Journal
Arabic Authors
د.محمد كاظم جاسم, د.سامي ابراهيم الربيعي, د.علي سبع حمود
English Authors
Mohammed Jasim Kadhim , Sami Ibrahim Al-Rubaiey , Ali Sabea Hammood
Abstract
تاثير الطاقة النوعية لليزر على تحسين الخواص لطلاءات الرش بالبلازما للزركونيا المستقرة جزئيا باليتيريا
Abstract
a b s t r a c t A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% yttria partially stabilized zirconia (YPSZ) coatings; the effects of laser specific energy was investigated. The sealed coatings were characterized by SEM, EDS, WDS, XRD and microhardness. It was possible to control the cell size (or well-sintered ‘domain like’ structure), crack width, depth of sealing and depth of concavity by carefully adjusting the specific energy. The microstructure of the sealed coatings was characterized by a cellular structure at all laser parameters studied. Cracks formed under optimum specific energies (1–2 J/mm2) were seen to be shallow and they do not penetrate through the plasma sprayed coating. The sealed coatings have much lower roughness and higher hardness than non-treated coatings indicating the beneficial effect of plasma treatment.
Publication Date
9/13/2012
Publisher
Optics and Lasers in Engineering- ELSEVIER-Calrivate Analytics
Volume No
51
Issue No
DOI
https://doi.org/10.1016/j.optlaseng.2012.08.010
Pages
159-166
External Link
https://www.sciencedirect.com/science/article/pii/S0143816612002576?via%3Dihub
Keywords
Keywords: Yttria partially stabilized zirconia Plasma sprayed coating Laser specific energy Coating sealing Crack networ
رجوع